bump nats
bump nats

[delivers #82870274]

Submodule src/github.com/apcera/nats e17cb62..4ca550d:
  > Stop ping timer on reconnect
  > Bumped version
  > Merge pull request #41 from apcera/waitforexits
  > Bumped version for first pass client ping

Signed-off-by: Ted Young <66c8979f4bb24f9b49cd80cbed4f06a51450d4f8@pivotallabs.com>

cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release,cloudfoundry-incubator/diego-release